Works well with others
As a senior level employee it's my job to train and mentor new recruits. I hold learning workshops for multiple disciplines. I define hiring requirements and I conduct interviews. I evaluate tools we'll be using and I architect plans.
Front-end and full-stack developers are great collaborators. We bridge and align stakeholders, engineers, designers, customers, end-users, and others.
My experience ranges from a lone wolf responsible for everything, to working on large teams with over 1000 people.